Responses
Maybe it goes even deeper? Since it's even going to affect the outside world, i suspected sou left because there was a big problem in the island and it's too complicated he didn't want to drag fourin into it, and it seems to be close to the truth
Soooooo Red Chanpuru took a bad way, they need a new leader (because the current one is the problem or there is none right now) and the are at least two factions. To bring the city back on the right track Sun Fei's faction has to win and he'll have to take over as the leader. It'll be so much more interesting if Sun Fei stays, I mean him kind of turning into a city lord, would suit him rather well. (just like his "Ghost King dad")